212457157 has 8 divisors (see below), whose sum is σ = 233597952. Its totient is φ = 191620800.

The previous prime is 212457137. The next prime is 212457169. The reversal of 212457157 is 751754212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212457157 - 2⁷ = 212457029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212457137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74644 + ... + 77437.

It is an arithmetic number, because the mean of its divisors is an integer number (29199744).

Almost surely, 2^212457157 is an apocalyptic number.

It is an amenable number.

212457157 is a deficient number, since it is larger than the sum of its proper divisors (21140795).

212457157 is a wasteful number, since it uses less digits than its factorization.

212457157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152219.

The product of its digits is 19600, while the sum is 34.

The square root of 212457157 is about 14575.9101602610. The cubic root of 212457157 is about 596.7014894248.

The spelling of 212457157 in words is "two hundred twelve million, four hundred fifty-seven thousand, one hundred fifty-seven".